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. Author manuscript; available in PMC: 2018 Apr 1.
Published in final edited form as: Cancer Epidemiol Biomarkers Prev. 2017 Feb 14;26(4):525–532. doi: 10.1158/1055-9965.EPI-16-0925

Figure 3. Surface Splines for Physical Activity by Age and a. Greenness and b. Walkability.

Figure 3

Note: Analyses were adjusted for study site, race, education, income, and employment status. Greenness defined using MODIS Normalized Difference Vegetation Index; Walkability defined using EPA Smart Location Database information on gross population density, street intersection density, and land use diversity